Powtran PI9100 Series Manual page 139

Chapter 5 Function parameter
输出频率 Hz
Output
frequency
F7.17
Reverse rotation control
For certain production equipments, the reverse rotation may result in damage to the
equipment, the function can disable the reverse rotation. The factory default allows reverse
rotation.
Set frequency lower than
F7.18
lower limit frequency mode
When the set frequency is lower than the lower limit frequency, the inverter operating
status can be selected through the parameter. PI9000 provides three modes of operation to
meet the needs of a variety of applications.
F7.19
Droop control
This function is generally used for the load distribution that several motors drag the
same one load.
The droop control means that the inverter output frequency is decreased as the load is
increased, so that when several motors drag(work for)the same one load, each motor's output
frequency much drops, which can reduce the load of the motor to balance evenly multiple
motors' load .
This parameter means the decreased value of output frequency when the inverter outputs
the rated load.
Setting cumulative power-on
F7.20
arrival time
When the total power-on time(F6.08) reaches the time set by F7.20, the inverter
multifunction digital DO outputs ON signal.
Setting cumulative running
F7.21
arrival time
Used to set the running time of inverter.
When the total power-on time(F6.07) reaches the set timeF7.21, the inverter
Forward
正转
死区时间
Deadband
Schematic diagram of the deadband of forwad and reverse
正反转死区时间示意图
ti
Time
时间 t
Reversal
Allow
Prohibit
Running at lower
limit frequency
Stop
Zero speed running
0.00Hz to 10.00Hz
0h to 36000h
0h to 36000h
134
0
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0
1
0
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0
1
2
☆
0.00Hz
☆
0h
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0h